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    • 7. 发明授权
    • Method for determining temperature with the aid of the internal
resistance of a lambda sensor
    • 用LAMBDA传感器内阻测定温度的方法
    • US5129258A
    • 1992-07-14
    • US477923
    • 1990-06-21
    • Manfred Homeyer
    • Manfred Homeyer
    • G01K7/26F02D41/14G01N27/406G01N27/409
    • F02D41/1455G01N27/4065
    • In a method for determining the exhaust gas temperature, the internal resistance of a lambda sensor is measured, and it is determined whether lean or rich mixture is present. Depending on which mixture type is present, the exhaust gas temperature associated with the measured internal resistance value is read out from one of two internal resistance value/exhaust gas temperature characteristic curves. This method can be used correspondingly for determining the sensor temperature from the internal resistance.The exhaust gas temperature determined as above only applies accurately for steady-state cases. In order to obtain satisfactory values even in non-steady-state cases, the exhaust gas temperature is averaged in a sliding manner. The present exhaust gas temperature is determined from the particular average value and the particular rise in the exhaust gas temperature/time curve.The mentioned methods permit the exhaust gas temperature to be determined without a separate temperature measuring element. With a single measurement, namely that of the internal resistance, the sensor temperature and the exhaust gas temperature can be determined with a high degree of accuracy.
    • PCT No.PCT / DE89 / 00637 Sec。 371 1990年6月21日第 102(e)日期1990年6月21日PCT提交1989年10月6日PCT公布。 出版物WO90 / 04764 日期1990年5月3日。在确定排气温度的方法中,测量λ传感器的内阻,并确定是否存在贫或富混合物。 根据存在的混合类型,从两个内部电阻值/排气温度特性曲线中的一个读出与测量的内部电阻值相关联的废气温度。 该方法可以相应地用于从内阻确定传感器温度。 如上确定的废气温度仅适用于稳态情况。 为了即使在非稳态情况下也能获得令人满意的值,排气温度以滑动方式平均化。 根据特定平均值和废气温度/时间曲线中的特定上升确定当前排气温度。 所提及的方法允许在没有单独的温度测量元件的情况下确定废气温度。 通过单次测量,即内部电阻的测量,可以高精度地确定传感器温度和排气温度。